Powder composition for castable refractory and premixed material comprising the same, method for applying premixed material and refractory hardene product therefrom
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United States of America Patent
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Issued Date -
Oct 27, 2005
app pub date -
Dec 27, 2004
filing date -
Jun 28, 2002
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Abstract
A premixed material is obtained by tempering a castable refractory powder composition comprising refractory aggregate, fine refractory powder, alumina cement, a dispersing agent and an alumina cement hydration stopper with water. The hydration stopper is acidic in a state of an aqueous solution. The amount of the hydration stopper is controlled such that the premixed material has a pH of 2 to 7. Immediately after adding and mixing an alumina cement hydration starter to the premixed material, the resultant mixture is cast into a mold. The addition of the hydration starter can be carried out 5 days or more after the production of the premixed material.
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